2008 BMW X3 Owner's Manual - Page 56
2008 BMW X3 Manual
Page 56 highlights
Technology for comfort, convenience and safety After releasing the brake, start driving immediately; otherwise, the acceleration assistant will no longer hold the vehicle after approx. 2 seconds and the vehicle will start to roll backward.< > Sporty driving style: slip in the drive wheels, high lateral acceleration > When driving with snow chains* When driving with a compact wheel, the Flat Tire Monitor cannot operate. Malfunction The warning lamp for the brake system lights up in yellow. The acceleration assistant has failed. The vehicle will not be held after the brake is released. Have the system checked as soon as possible. Initializing system The initialization is completed while driving and can be interrupted at any time. The initialization automatically continues when driving resumes. Do not initialize the system when driving with snow chains* or with a compact wheel.< 1. Start the engine just before driving, but do not begin to drive. 2. Press the button for at least 4 seconds, but not longer than 2 minutes. After the button is released, the indicator lamp in the instrument cluster lights up yellow for a few seconds. Flat Tire Monitor FTM* The concept The Flat Tire Monitor keeps track of the inflation pressures in the four mounted tires as you drive. The system triggers an alert whenever the inflation pressure in one tire drops significantly in relation to the pressure in another tire. When a loss of pressure occurs, the rolling radius changes and with it, the rotational speed of the wheels. This change is detected and signaled as a flat tire. Functional requirement To ensure the reliable signaling of a flat tire, the system must be initialized at the correct tire inflation pressure. The initialization must be carried out after each correction of the tire inflation pressure and after every tire or wheel change.< 3. Begin driving. The initialization is completed while driving, without requiring any further input from you. Indication of a flat tire System limits The Flat Tire Monitor cannot predict sudden severe tire damage caused by outside factors and does not detect a natural, even pressure drop in all four tires.< In the following situations, the system could be delayed or malfunction: > When the system has not been initialized > When driving on snow-covered or slippery road surfaces The warning lamp lights up red. In addition, an acoustic signal sounds. There is a flat tire or extensive inflation pressure loss. 1. Reduce speed and stop the vehicle carefully. Avoid sudden braking and steering maneuvers. 2. Identify damaged tire. If identification is not possible, contact your BMW Sports Activity Vehicle Center.< 54 Online Edition for Part no. 01 41 0 014 250 - © 08/07 BMW AG